From patchwork Wed Jan 26 16:18:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Tissoires X-Patchwork-Id: 536974 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 314C2C28CF5 for ; Wed, 26 Jan 2022 16:19:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243106AbiAZQTp (ORCPT ); Wed, 26 Jan 2022 11:19:45 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:28085 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243154AbiAZQTT (ORCPT ); Wed, 26 Jan 2022 11:19:19 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1643213959; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=KuQ1p07r0IQfw/KWLAzhGpK1OCHWGg7jMGOt+HexzfE=; b=ZpuJttUK5Nwv9WPUITw1FLJfz56YQPj84OXFWnzF1QRlOseegRKuEj/mFVQShxCEs3X/pl woJKobZKDnSm/draceP2hU3Bu1MfbuUdb8PCRIWLol65aybVIeAWmHBQI8QXIWCXVdJ1CB c6OnZJBMUCYhRzvp0MMbiAkETP/FQLQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-619-3GYuTuBqOZirOhX2SkOuUA-1; Wed, 26 Jan 2022 11:19:15 -0500 X-MC-Unique: 3GYuTuBqOZirOhX2SkOuUA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DD03E46865; Wed, 26 Jan 2022 16:19:13 +0000 (UTC) Received: from plouf.redhat.com (unknown [10.39.193.93]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4BB9B798DD; Wed, 26 Jan 2022 16:19:11 +0000 (UTC) From: Benjamin Tissoires To: Jiri Kosina , Dmitry Torokhov , Jonathan Corbet , =?utf-8?q?Ahelenia_Ziemia=C5=84ska?= , Ping Cheng , Aaron Armstrong Skomra , Jason Gerecke , Peter Hutterer Cc: linux-input@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Benjamin Tissoires Subject: [PATCH 10/12] HID: input: remove the need for HID_QUIRK_INVERT Date: Wed, 26 Jan 2022 17:18:30 +0100 Message-Id: <20220126161832.3193805-11-benjamin.tissoires@redhat.com> In-Reply-To: <20220126161832.3193805-1-benjamin.tissoires@redhat.com> References: <20220126161832.3193805-1-benjamin.tissoires@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org HID_QUIRK_INVERT is kind of complex to deal with and was bogus. Furthermore, it didn't make sense to use a global per struct hid_device quirk for something dynamic as the current state. Store the current tool information in the report itself, and re-order the processing of the fields to enforce having all the tablet "state" fields before getting to In Range and other input fields. This way, we now have all the information whether a tool is present or not while processing In Range. This new behavior enforces that only one tool gets forwarded to userspace at the same time, and that if either eraser or invert is set, we enforce BTN_TOOL_RUBBER. Signed-off-by: Benjamin Tissoires --- drivers/hid/hid-input.c | 66 +++++++++++++++++++++++++++++++++++------ include/linux/hid.h | 6 +++- 2 files changed, 62 insertions(+), 10 deletions(-) diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index 61d91117f4ae..2d13d3ad9d3c 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -63,8 +63,11 @@ static const struct { * This still leaves us 65535 individual priority values. */ static const __u32 hidinput_usages_priorities[] = { + HID_DG_ERASER, /* Eraser (eraser touching) must always come before tipswitch */ HID_DG_INVERT, /* Invert must always come before In Range */ - HID_DG_INRANGE, + HID_DG_TIPSWITCH, /* Is the tip of the tool touching? */ + HID_DG_TIPPRESSURE, /* Tip Pressure might emulate tip switch */ + HID_DG_INRANGE, /* In Range needs to come after the other tool states */ }; #define map_abs(c) hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c)) @@ -1368,6 +1371,7 @@ static void hidinput_handle_scroll(struct hid_usage *usage, void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) { struct input_dev *input; + struct hid_report *report = field->report; unsigned *quirks = &hid->quirks; if (!usage->type) @@ -1418,25 +1422,69 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct } switch (usage->hid) { + case HID_DG_ERASER: + report->tool_active |= !!value; + + /* + * if eraser is set, we must enforce BTN_TOOL_RUBBER + * to accommodate for devices not following the spec. + */ + if (value) + report->tool = BTN_TOOL_RUBBER; + + /* let hid-input set BTN_TOUCH */ + break; + case HID_DG_INVERT: - *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT); + report->tool_active |= !!value; + + /* + * If invert is set, we store BTN_TOOL_RUBBER. + */ + if (value) + report->tool = BTN_TOOL_RUBBER; + + /* no further processing */ return; case HID_DG_INRANGE: - if (value) { - input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1); - return; - } - input_event(input, usage->type, usage->code, 0); - input_event(input, usage->type, BTN_TOOL_RUBBER, 0); + report->tool_active |= !!value; + + /* + * If the tool is in used (any of TipSwitch, Erase, Invert, + * InRange), and if tool is not set, store our mapping + */ + if (report->tool_active && !report->tool) + report->tool = usage->code; + + input_event(input, EV_KEY, usage->code, report->tool == usage->code); + input_event(input, EV_KEY, BTN_TOOL_RUBBER, report->tool == BTN_TOOL_RUBBER); + + /* reset tool and tool_active for the next event */ + report->tool = 0; + report->tool_active = false; + + /* no further processing */ return; + case HID_DG_TIPSWITCH: + report->tool_active |= !!value; + + /* if tool is set we should ignore the current value */ + if (report->tool) + return; + + break; + case HID_DG_TIPPRESSURE: if (*quirks & HID_QUIRK_NOTOUCH) { int a = field->logical_minimum; int b = field->logical_maximum; - input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3)); + if (value > a + ((b - a) >> 3)) { + input_event(input, EV_KEY, BTN_TOUCH, 1); + report->tool_active = true; + } } break; diff --git a/include/linux/hid.h b/include/linux/hid.h index eaad0655b05c..feb8df61168f 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -347,7 +347,7 @@ struct hid_item { */ #define MAX_USBHID_BOOT_QUIRKS 4 -#define HID_QUIRK_INVERT BIT(0) +/* BIT(0) reserved for backward compatibility, was HID_QUIRK_INVERT */ #define HID_QUIRK_NOTOUCH BIT(1) #define HID_QUIRK_IGNORE BIT(2) #define HID_QUIRK_NOGET BIT(3) @@ -515,6 +515,10 @@ struct hid_report { unsigned maxfield; /* maximum valid field index */ unsigned size; /* size of the report (bits) */ struct hid_device *device; /* associated device */ + + /* tool related state */ + bool tool_active; /* whether the current tool is active */ + unsigned int tool; /* BTN_TOOL_* */ }; #define HID_MAX_IDS 256